Flour resist is great because it is very inexpensive and most of us have flour on hand, so there is no need to make a special trip to the store or place an internet order. And you can use almost any variety. There are subtle differences between whole wheat, all purpose and bread flour, but they all will work. (The whole wheat can be a little more difficult to remove.) I haven't tried any other grain flours (except rice), so there is a whole world of experimentation out there.
Flour resist is also very versatile. It creates a lovely crackle pattern and it works well with most application techniques.
|Multiple layers of flour paste crackle|
|Flour paste leaf print|
|Multiple layers of flour paste resist|
|Rice flour resist applied with a syringe|
|Rice flour applied with a squeeze bottle|
|Peace Amidst Chaos: the background swirl was created with flour resist|
Read my tips for working with resists
Read about working with sugar syrup as a resist
Read about working with acrylic medium as a resist
Read about working with oatmeal resist
Read about working with potato dextrin resist
Read about working with soy wax resist